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SECTION 2 OVERVIEW A friable wheel is the best choice for grinding tool steels because it cuts fast and stays cool. Coarse and very fine natural Arkansas stones: Washita and black hard Arkansas oilstones. chisels, especially if you sharpen with a secondary bevel on honing stones after grinding. A finer stone might be useful for carving tools and turning tools where you won’t be using a secondary bevel. You should dress a new wheel on the machine to true up the face before using it. Oilstones The most common natural oilstones today are Arkansas stones. The coarsest grade is Washita, followed by soft Arkansas, hard Arkansas, and black hard Arkansas. Goodquality Arkansas stones are getting harder to find. They last a long time, though, so if you find a used stone, chances are good that it will have a lot of life left in it. ▲! WARNING Always protect your eyes when grinding! A dust mask is a sensible precaution, too. And use the guards on the grinder—they are there for a reason. Abrasives 15